US2246260A - Try square - Google Patents

Description

June 17, 1941.

N. B. MCGRATH r TRY SQUARE Filed Aug. 5, 19:59

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Patented June 17, 1941 TRY SQUARE Nicholas signor Southington, Conn., cut

B. McGrath, southingto, Conn., asto The Southington Hardware Company,

a corporation of Connecti- Application August 5, 1939, Serial No. 288,476

1 Claim.

The present invention relates to measuring instruments and comprises a try square of improved construction.

One object of the invention is to provide a try square in which the metal blade and stock will be maintained in fixed relation during use.

Another object of the invention is to provide a try square Ithat may be readily manufactured and assembled.

A further object of the invention is to provide a try square having means for securing the stock, metal trim and lblade rigidly together.

Other objects of the invention will become apparent as the description proceeds.

Of the accompanying drawing:

Fig. 1 is a side view of a try square embodying the invention;

Fig. 2 is an enlarged sectional view along the line 2-2 of Fig. 1;

Figs. 3 and 3A are side and end views respectively of the channel metal used for forming the trim of the stock or handle of the try square of Fig. 1;

Fig. 4 is a perspective View of the trim ready for assembly with the stock and blade;

Fig. 5 is a side View of a try square illustrating another embodiment of the invention; and

Fig. 6 is an enlarged sectional view along the line 6-6 of Fig. 5.

As shown in the drawlng,.the new try square comprises the metal scale 2, stock or handle 4 of wood or the like, and trim 6. The trim 6 ls of channel form, and preferably of brass.

In the form of the invention illustrated in Fig. 1, the handle 4 is beveled along the upper end and is provided with the usual indentation 8 for facilitating gripping. The straight inner edge and the beveled edge of the handle are recessed on both sides to a depth equal to the thickness of the channel brass trim so that, when the trim is in place, its outer surface will be flush with the surface of the handle. The beveled edge of the handle and that portion of the trim which iits thereover are provided with aligned slots for reception of the scale 2. Rivets l0 passing through aligned holes in the trim, handle and scale secure the parts rigidly together. An additional rivet l2 may be provided for securing the handle and scale together and two more rivets I4 for securing the handle and trim together.

In forming the trim for the try square of Fig. 1, a suitable length of the channel brass is provided with a 45 cut, indicated at It in Fig. 3, at the point where the beveled edge will begin, and with a second 45 cut, indicated at I8, at the end, corresponding to the corner of the nished try square. The trim is then bent about the cut It into the position shown in Fig. 4 and the longitudinal slot 2!) cut centrally in the portion between the cuts I6 and I8. The trim is then assembled on the handle, the scale 2 inserted into the aligned slots and the parts riveted together.

The try square of Fig. 4 differs from that oi Fig. 1 only in that the upper end of the handle 4' is not beveled and .consequently no bending of the channel metal trim 6 is necessary. The trim and handle are provided with suitable aligned slots for reception of the scale 2. As with the try square of Fig. l the trim, handle and scale are all held together by rivets 22 and rivets 24 hold the trim and handle together.

As compared with earlier devices, the use of channel metal for the trim simpliiies the manufacture and assembly, gives a lbetter protection to the Wooden edges of the handle and insures more holding power for the rivets, because the upsets on the rivets are on metal. The channel metal trim need not be of brass but could be of aluminum, stainless steel or the like. apparent also that the improved construction requires relatively few rivets to hold the elements oi the try square together in permanent fixed relation.

The following is claimed:

A try square comprising in combination a scale, a stock provided with a slot for reception of the scale, a channel metal trim for the inner edge of the stock likewise provided with a slot for reception of the scale, said trim fitting snugly over the inner edge of the stock with its sides overlying a substantial area of the sides of the stock, and rivets extending through said trim, stock and scale with their upsets on the outer surface of the sides of said trim whereby the parts are held in fixed relation.

NICHOLAS B. MCGRATH.

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